How To Change Name Of File In Javascript From Inputfile

If you are looking to change the name of a file using Javascript from an input file field, you've come to the right place! Renaming files dynamically can be a handy feature to personalize file names or improve user experience. We'll walk through a step-by-step guide on how to achieve this task effectively.

First things first, let's set up our input field in the HTML file:

In this code snippet, we have an input field of type 'file' with the id 'fileInput'. We've also added an onchange event listener that calls the 'changeFileName' function when the file selection changes.

Now, let's create the Javascript function to handle the file name change:

function changeFileName(event) {
  const file = event.target.files[0];
  
  // Get the new file name from user input
  const newFileName = prompt('Enter the new file name:', file.name);
  
  if (newFileName) {
    const newFile = new File([file], newFileName, { type: file.type });
    
    // Replace the file input with the new file
    event.target.files = [newFile];
  }
}

In the 'changeFileName' function, we first retrieve the selected file using 'event.target.files[0]'. We then prompt the user to enter a new file name using the built-in 'prompt' function, which displays a dialog box allowing the user to input text.

If the user enters a new file name and clicks 'OK', we create a new File object called 'newFile' with the updated name. The new file is created by passing the original file contents, the new file name, and the file type to the File constructor.

Finally, we update the file input field with the new file by assigning the array containing the updated file to 'event.target.files'. This effectively changes the selected file's name to the one entered by the user.

Remember that this approach changes the displayed name of the file in the input field but doesn't actually change the file name on the server or file system. The user will see the updated file name while interacting with the input field.

By following these steps and understanding the code snippets provided, you can easily implement a feature to change the name of a file in Javascript from an input file field. Experiment with the code, tailor it to your requirements, and enhance your web applications with this functionality. Happy coding!